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AMD Radeon R9 285

Tonga
Graphics Processor
1792
Cores
112
TMUs
32
ROPs
2048 MB
Memory Size
GDDR5
Memory Type
256 bit
Bus Width
AMD Radeon R9 285 Photo AMD Tonga Photo
The Radeon R9 285 was a performance graphics card by AMD, launched in September 2014. Built on the 28 nm process, and based on the Tonga graphics processor, in its Tonga PRO variant, the card supports DirectX 12.0. The Tonga graphics processor is a large chip with a die area of 366 mm² and 5,000 million transistors. Unlike the fully unlocked Radeon R9 285X, which uses the same GPU but has all 2048 shaders enabled, AMD has disabled some shading units on the Radeon R9 285 to reach the product's target shader count. It features 1792 shading units, 112 texture mapping units and 32 ROPs. AMD has placed 2,048 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface. The GPU is operating at a frequency of 918 MHz, memory is running at 1375 MHz.
Being a dual-slot card, the AMD Radeon R9 285 draws power from 2x 6-pin power connectors, with power draw rated at 190 W maximum. Display outputs include: 2x DVI, 1x HDMI, 1x DisplayPort. Radeon R9 285 is connected to the rest of the system using a PCI-Express 3.0 x16 interface. The card measures 221 mm in length, and features a dual-slot cooling solution. Its price at launch was 249 US Dollars.

Graphics Processor

GPU Name
Tonga
GPU Variant
Tonga PRO
(215-0851128)
Architecture
GCN 3.0
Process Size
28 nm
Transistors
5,000 million
Die Size
366 mm²

Graphics Card

Release Date
Sep 2nd, 2014
Generation
Volcanic Islands
(R9 200)
Production
End-of-life
Launch Price
249 USD
Bus Interface
PCIe 3.0 x16

Relative Performance

3%
4%
5%
7%
8%
9%
11%
14%
14%
15%
16%
16%
19%
20%
21%
22%
23%
24%
25%
27%
27%
28%
29%
33%
34%
34%
35%
35%
35%
35%
37%
39%
40%
41%
42%
42%
43%
43%
43%
44%
46%
47%
50%
51%
51%
53%
53%
55%
59%
61%
61%
62%
62%
65%
65%
66%
67%
70%
71%
73%
73%
73%
73%
79%
80%
82%
83%
83%
84%
84%
85%
85%
88%
94%
97%
99%
100%
Radeon R9 285
101%
102%
104%
107%
110%
112%
114%
114%
126%
139%
141%
150%
151%
153%
155%
156%
157%
159%
160%
161%
162%
171%
174%
177%
177%
194%
198%
201%
216%
237%
246%
265%
265%
279%
327%
335%
365%
416%
Based on TPU review data: "Performance Summary" at 1920x1080

Clock Speeds

GPU Clock
918 MHz
Memory Clock
1375 MHz
5500 MHz effective

Memory

Memory Size
2048 MB
Memory Type
GDDR5
Memory Bus
256 bit
Bandwidth
176.0 GB/s

Render Config

Shading Units
1792
TMUs
112
ROPs
32
Compute Units
28

Theoretical Performance

Pixel Rate
29.38 GPixel/s
Texture Rate
102.8 GTexel/s
FP16 (half) performance
3,290 GFLOPS (1:1)
FP32 (float) performance
3,290 GFLOPS
FP64 (double) performance
205.6 GFLOPS (1:16)

Board Design

Slot Width
Dual-slot
Length
8.7 inches
221 mm
TDP
190 W
Outputs
2x DVI
1x HDMI
1x DisplayPort
Power Connectors
2x 6-pin
Board Number
C766

Graphics Features

DirectX
12.0 (12_0)
OpenGL
4.5
OpenCL
2.0
Vulkan
1.1.82
Shader Model
6.0

Tonga GPU Notes

Graphics/Compute: GFX8 (gfx802)
Display Core Engine: 10.0
Unified Video Decoder: 5.0
Video Compression Engine: 3.0
ROCm Support

Retail boards based on this design (14)

Name GPU Clock Memory Clock Other Changes
ASUS Strix R9 285 OC 954 MHz 1375 MHz 10.6 inches/269 mm
Club 3D R9 285 royalQueen 945 MHz 1375 MHz 8.86 inches/225 mm
GIGABYTE R9 285 WindForce 2X OC 973 MHz 1375 MHz
HIS R9 285 IceQ X2 OC 938 MHz 1375 MHz 10.63 inches/270 mm
HIS R9 285 Mini IceQ X2 OC 938 MHz 1375 MHz 8.27 inches/210 mm
MSI R9 285 Gaming OC 973 MHz 1375 MHz 10.34 inches/263 mm
PowerColor TurboDuo R9 285 OC 945 MHz 1375 MHz 8.16 inches/207 mm
Sapphire Dual-X R9 285 918 MHz 1375 MHz 10.4 inches/264 mm
Sapphire Dual-X R9 285 OC 965 MHz 1400 MHz 10.4 inches/264 mm
Sapphire R9 285 ITX Compact 918 MHz 1375 MHz 6.73 inches/171 mm, 1x DVI 1x HDMI 2x mini-DisplayPort
Sapphire R9 285 ITX Compact OC 928 MHz 1375 MHz 6.73 inches/171 mm, 1x DVI 1x HDMI 2x mini-DisplayPort
VTX3D R9 285 X-Edition 945 MHz 1375 MHz 8.16 inches/207 mm
XFX R9 285 Black Edition 975 MHz 1375 MHz
XFX R9 285 Double Dissipation 918 MHz 1375 MHz